Basic Information

Name: Indium 
Symbol: In 
Atomic Number: 49 
Atomic Mass: 114.818 amu 
Melting Point: 156.61 °C (429.76 K, 313.898 °F) 
Boiling Point: 2000.0 °C (2273.15 K, 3632.0 °F) 
Number of Protons/Electrons: 49 
Number of Neutrons: 66 
Classification: Other Metals 
Crystal Structure: Tetragonal 
Density @ 293 K: 7.31 g/cm3 
Color: Silverish
Date of Discovery: 1863 
Discoverer: Ferdinand Reich 
Name Origin: From the Indigo color seen in its spectrum 
Uses: coating of high-speed bearings 
Obtained From: by-product of zinc refining